Black Box, an EA studio, announced today two new content packs for Need for Speed Undercover. The Challenge Series is free and features 60 events across two new game modes including the opportunity to earn up to three new cars. The premium Boss Car pack will give players access to Undercover's specially customized boss vehicles for $5.00 (400 MS points). Here is more info:

"The Challenge Series and Boss Car packs are available now on the PLAYSTATION3 computer entertainment system and coming soon on the Xbox 360 videogame system from Microsoft and the PC. This new content reflects an ongoing commitment of post-launch support to Need for Speed fans.

Challenge Series:

Highway Wars is the ultimate fusion of Undercover?s signature Highway Battles with the adrenaline fueled competition of sprint racing. In this mode, players will race at top speeds through traffic filled highways against three AI opponents in a winner take all battle to the finish line.

Highway Checkpoint forces the player to push their car to the limit as they weave through traffic in an attempt to make it to the next checkpoint before time expires.

Players can also earn three new vehicles as they complete the Challenge Series. Each vehicle is available for use in career or online and has been specifically tuned to compete against the top cars in the game.

Battle Machine Mazda RX-7 will be awarded upon completion of the first 30 events. Speed Machine Porsche 911 GT2 with matte black paint and custom gold liveries will be awarded after completing all 60 of the Challenge Series events.

Dominator Corvette Z06 is for players that dominate a minimum of 31 events.

Boss Car Pack

This premium car pack gives players access to the entire fleet of boss cars featured in Undercover. These high performance machines are tuned for maximum performance in their appropriate tiers enabling players to compete against the fastest cars in each tier of Undercover.